To the first question:
Depends, on the surface yes. If one has multiple ports, all the same and tagged and all going to the same VLAN-ID, they can be combined on the router or Switch.
Discussion: If there are any differences between any of the VLAN-IDS, like one has an implicit ( set on bridge port ) or explicit ( set on bridge port and properly (best practice opinion) access port entered on bridge vlan ( and also then clear to the reader), THEN that vlan-id has to be removed from the grouping approach. Also,obviously the same applies to an vlan-id involved in the access part of hybrid ports.
To the second question: Yes
Already answered above, there is a difference in the ports and thus 99 is separated out, as you have done.
Only paid to answer two questions at a time. Try the third question on your device and report back the results…